From 54a353d75f2836f1ab5f1eae2b60e54f52c2d0c4 Mon Sep 17 00:00:00 2001
From: Jordan <Cyberboss@users.noreply.github.com>
Date: Mon, 19 Jun 2023 11:51:39 -0400
Subject: [PATCH] Fix SwarmService.RemoteAbortUpdate race condition

---
 src/Tgstation.Server.Host/Swarm/SwarmService.cs | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/Tgstation.Server.Host/Swarm/SwarmService.cs b/src/Tgstation.Server.Host/Swarm/SwarmService.cs
index 1e22691426..a41b0cba00 100644
--- a/src/Tgstation.Server.Host/Swarm/SwarmService.cs
+++ b/src/Tgstation.Server.Host/Swarm/SwarmService.cs
@@ -704,10 +704,11 @@ namespace Tgstation.Server.Host.Swarm
 					Address = swarmConfiguration.ControllerAddress,
 				});
 
-			return Task.WhenAll(
-				swarmServers
-					.Where(x => !x.Controller)
-					.Select(SendRemoteAbort));
+			lock (swarmServers)
+				return Task.WhenAll(
+					swarmServers
+						.Where(x => !x.Controller)
+						.Select(SendRemoteAbort));
 		}
 
 		/// <summary>